This ledger covers the period January-December 1906. As the account book of final entry, it summarizes transactions relating to the cement works at Stewartsville and company offices in Philadelphia and Camden. There are accounts with Edison and various Edison companies, including the Edison Manufacturing Co. and the New Jersey and Pennsylvania Concentrating Works. The spine is labeled "Ledger 3," "1906" and "Portland Cement." The front cover is marked "16." The book contains 680 numbered pages and an index; some pages are blank.